JP3424322B2 - Co-rotating scroll fluid machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to balance adjustment of each scroll in a co-rotating scroll fluid machine.

[0002]

2. Description of the Related Art Conventionally, a scroll element composed of a drive scroll that rotates in conjunction with a drive shaft and a driven scroll that is driven by the rotation of the drive scroll around a driven shaft that is eccentric from the axis of the drive shaft. As a co-rotating scroll fluid machine including a portion, for example, Japanese Patent Laid-Open No. 3-26038.
The one described in Japanese Patent No. 8 is known.

This co-rotating scroll fluid machine is shown in FIG.
As shown in FIG. 7, a drive scroll C integrally formed at the shaft end of a drive shaft B connected to a motor M in a closed casing A, and a drive scroll C can rotate at a position eccentric to the shaft center of the drive shaft B. A driven scroll E having a driven axis D supported by
And the thrust plate F and the scroll element portion G
And each of the scrolls C and E has an end plate H,
H and spiral bodies J, J projectingly provided on the end plates H, H. In a state where the spiral bodies J, J are meshed with each other,
Along with the rotational drive of the drive scroll C by the drive shaft B, the driven scroll E is swung while being driven to rotate through the connecting means, and is moved to the action chamber formed between the spiral bodies J. For example, the gas fluid to be taken in is compressed.

The connecting means is, as shown in FIG. 8, provided on the outer peripheral portion of the end plate H of the drive scroll C.
A plurality of drive pins K1 having a convex curved surface on the circumferential side surface
A plurality of driven pins K2 having a concave curved surface on the circumferential side surface on the outer peripheral portion of the end plate of the driven scroll E at the same intervals. The driven pin K2 is positioned between the drive pins K1 so as to protrude from the side on which the spiral body J is formed, and
The scrolls C and E are engaged with each other while the curved surface of a part of the drive pins K1 of the drive pins K1 is in contact with the curved surface of the driven pin K2 facing the curved surface. With the rotation of the drive scroll C, the drive pin K1 pushes the driven pin K2 to cause the driven scroll E to revolve while being driven, thereby causing a rotational movement.

Further, the thrust plate F is fixed to the driven scroll E, and the fixation is such that a protrusion L1 further protruding from the driven pin K2 formed on the driven scroll E is attached to the tip end side of the driven pin K2. The projections L1 are formed at equal intervals, and the respective projections L1 are made to penetrate through the notches L2 formed in the outer peripheral portion of the end plate H of the drive scroll C, and the projections L1 are formed on the rear side of the end plate H of the drive scroll C. The thrust plate F is connected to the thrust plate F by means of a pin P so as to be fixed integrally, and by fixing the thrust plate F, the drive scroll C is held.

Further, conventionally, each of the scrolls C and E has been used.
Is supported so that the center of the spiral base circle of the spiral body J of each scroll C and E is the center of rotation, and therefore the center of rotation of each scroll C and E does not coincide with the center of gravity. Balance holes N1, N2, N3 are provided in the scrolls C, E and the thrust plate F, or balance weights, not shown, are provided to maintain a static balance and a dynamic balance. ing.

[0007]

However, in the above-described co-rotating scroll fluid machine, the drive scroll C, the driven scroll E and the thrust plate F are provided with balance holes or balance weights. After taking the scroll, each scroll C, E
Since it is necessary to maintain the static balance and the dynamic balance, there is a problem that the number of processing steps is increased, the cost is increased, and the member is increased in size for balancing. Further, in the scroll fluid machine shown in FIG. 7, the drive scroll C is embraced by the driven scroll E and the thrust plate F. Therefore, in particular, when balancing is performed in the drive scroll C, Due to the configuration, sufficient balance adjustment cannot be performed, and therefore, as shown in FIG. 7, it is necessary to separately provide balance weights Q and Q above and below the rotor RT of the motor M, resulting in an increase in the number of parts and cost. There is also a problem that the cost becomes high and the total weight increases.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a balance means for only one scroll so that the static balance and dynamic balance of each scroll can be sufficiently maintained. An object is to provide a scroll type scroll fluid machine.

[0009]

The invention according to claim 1 is
A drive scroll 4 that rotates in conjunction with the drive shaft 41 and a driven shaft 51 that is eccentric from the shaft center of the drive shaft 41
In a co-rotating scroll fluid machine including a scroll element portion 3 composed of a driven scroll 5 that is driven according to the rotation of the driving scroll 4, one scroll 5 or 4 of the driving scroll 4 and the driven scroll 5,
While supporting the center of gravity of the spiral body 32 protrudingly provided on the end plate 31 of the scroll 5 or 4 so as to substantially coincide with the center of rotation, the other scroll 4 or 5 is projected onto the end plate 31 of the other scroll 4 or 5. The center of the basic circle of the spiral body 32 to be installed is compressed and expanded by co-rotating motion of the scrolls 4 and 5 with respect to the center of the basic circle of the spiral body 32 projecting from the end plate 31 of the scroll 5 or 4. And the center of the base of the scroll 32 and the center of gravity of the scroll 32 are extended so that the center of gravity of the end plate 31 of the other scroll 4 or 5 substantially coincides with the center of rotation. The balance adjusting unit 7 is provided on the line.

According to the second aspect of the present invention, the balance adjusting portion 7 is formed by providing at least one of a concave portion and a convex portion on the other scroll 4 or 5.

[0011] According to a third aspect, claim 1 or 2
In serial mounting of invention, the scroll element part 3, the drive scroll 4, driven scroll 5 made thrust plate 6 and the Oldham ring 33, and integrally coupled to the other scroll 4 or 5 in the thrust plate 6, Inside, one scroll 5 or 4 is installed,
The one scroll 5 or 4 is supported so that the center of gravity of the scroll 32 substantially coincides with the center of rotation, while the other scroll 4 to which the thrust plate 6 is coupled is supported.
Alternatively, the balance adjusting portion 7 is provided on the joint portion side of the thrust plate 6 in 5 or 5.

[0012] The invention of claim 4, wherein the claim 1 or 3
In the invention described in (1), the scroll element portion 3 is composed of a drive scroll 4, a driven scroll 5, a thrust plate 6 and an Oldham ring 33, and the other scroll 4 or 5 is integrally coupled to the thrust plate 6, Inside one scroll 5 or 4 is installed,
The one scroll 5 or 4 is supported so that the center of gravity of the scroll 32 substantially coincides with the center of rotation.
The thrust plate 6 connected to the other scroll 4 or 5 is provided with a balance adjusting portion 7 including at least one of a concave portion and a convex portion.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, the balance adjusting portions 7 and 7 are provided on the thrust plate 6 and the other scroll 4 or 5 connecting the thrust plate 6 to each other . is there.

The invention according to claim 6 is the same as in claims 1 to 5.
In the invention described in the offset, the winding end end portion of the spiral body 32 in the other scroll 4 or 5 of the driving scroll 4 and the driven scroll 5 is defined as the winding end end portion of the scroll body 32 in one scroll 5 or 4. In contrast, the spiral bodies 32, 32 are engaged with each other by being extended by approximately 180 degrees, and the extended end portion of the spiral body 32 in the other scroll 4 or 5 is set to the winding end end portion in the one scroll 5 or 4. by close, one of the <br/> scroll 5 or 4 wherein, at the center of gravity of the spiral body 32 is supported so as to substantially coincide with the center of rotation.

[0015]

According to the first aspect of the invention, one of the drive scroll 4 and the driven scroll 5 is the scroll 5 or 4
Is supported so that the center of gravity of the spiral body 32 protruding from the end plate 31 of the scroll 5 or 4 substantially coincides with the center of rotation. Therefore, balance processing for performing balance adjustment is performed on one scroll 5 or 4. Since it is not necessary to perform the above, the number of processing steps for performing the balance processing is reduced, and it is not necessary to provide the balance weight to the rotor of the motor as in the conventional case.
The number of members for adjusting the balance is also reduced, and the cost can be reduced accordingly.

Further, the one scroll 5 or 4
If the center of gravity of the spiral body 32 is aligned with the center of rotation, it is not necessary to change the balance adjustment even if the height of the spiral body 32 is changed due to the design change accompanying the capacity adjustment. Changing the balance adjustment also scrolls the other 4
In the invention according to claim 2, the balance adjustment can be easily performed because it is necessary to perform only for 5 or 5. In the invention according to claim 2, the balance adjustment portion 7 is provided with at least one of a concave portion and a convex portion on the other scroll 4 or 5. Since it is formed, the balance adjustment can be performed without the need to separately attach a member for balance adjustment. Therefore, it is possible to prevent an increase in the number of parts while providing the balance adjustment section 7.

According to the third aspect of the present invention, one of the scrolls 5 or 4 is held by the thrust plate 6 and the other.
Since the balance adjusting portion 7 is formed on the side of the scroll 4 or 5 that is connected to the thrust plate 6, the balance height is higher than that of the spiral body 32. Since it is formed at the same height as that of the spiral body 32, the balance adjusting portion 7 can be formed at the same height as the spiral body 32, and therefore, the balance body 7 can be evenly distributed toward both sides in the axial direction with respect to the center of the spiral body 32 in the height direction. Since the balance adjusting portion 7 can be formed, good balance adjustment can be performed, and the balance adjusting portion 7 can be formed without increasing the size of the scroll member.

Further, even if the height of the spiral body 32 is changed due to the design change of the scroll element portion 3, the height of the joint portion is also changed accordingly. Therefore, it is possible to eliminate the need to change the balance adjusting unit 7.

According to the fourth aspect of the present invention, since the thrust plate 6 is provided with the balance adjusting portion 7 composed of at least one of a concave portion and a convex portion, the number of parts does not increase and the scroll 4 or 5 of the other scroll is provided. it can be easily performed balancing than done in, by combination with balance adjustment in the other scroll 4 or 5 in the invention of claim 3, wherein, the balance has not been adjusted in the scroll 4 or 5 of the other Corrections can be made and balance adjustments can be made better.

According to the invention of claim 5, in the invention of claim 4, balance adjusting parts 7, 7 are provided on the thrust plate 6 and the other scroll 4 or 5 connecting the thrust plate 6 to each other . Since these balance adjusting parts 7, 7 can be formed in the axial direction centering on the center part in the height direction of the spiral body 32, each scroll 4, 5
It is possible to adjust the distance between the centers of gravity in the axial direction, and not only can the fine adjustment of the balance of the other scroll 4 or 5 be performed more reliably and satisfactorily, but the adjustment of the dynamic balance is also ensured. It can be done.

According to a sixth aspect of the invention, one end of the spiral body 32 of the other scroll 4 or 5 is set to one end.
Since it is asymmetric by extending 180 degrees with respect to the scroll body 32 of the scroll 5 or 4,
The center of gravity of the other scroll 4 or 5 that has been extended by
Is opposite to the case of a symmetrical, will be closer to the rotation center of the scroll <br/> Lumpur 4 or 5 of the other, thus the scroll 4 or 5 of the other, when performing balance adjustment, The amount of balance adjustment can be reduced, the balance adjustment can be made effective, and the cost can be further reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. The first embodiment shown in FIG. 1 is applied to a scroll compressor as a co-rotating scroll fluid machine,
In this compressor, a co-rotating scroll element portion 3 supported by a bearing housing 2 is installed inside the closed casing 1, and a motor M is arranged below the inside of the casing 1.

The scroll element portion 3 is provided with the motor M.
A drive scroll 4 integrally formed with a drive shaft 41 coupled to the drive shaft 41, and a driven shaft 51 supported by the bearing housing 2 at a position eccentric to the shaft center of the drive shaft 41.
The driven scroll 5 revolves while being driven to rotate by the driving of the drive scroll 4, and further, at the outer peripheral portion of the end plate 31 of the drive scroll 4, on the side of the end plate 31 where the spiral body 32 is formed, A padding portion of the driven scroll 5 is attached to the padding portion 42 in a state where the padding portion 42 having the same height as 32 is projected and the spiral bodies 32 and 32 of the scrolls 4 and 5 are meshed with each other. A thrust plate 6 disposed on the back side of 31 is coupled with a bolt W so as to sandwich the driven scroll 5, and the drive scroll 4 is driven between the thrust plate 6 and the end plate 31 of the driven scroll 5. Accordingly, an Oldham ring 33 for interposing the driven scroll 5 while rotating the driven scroll 5 via the thrust plate 6 is interposed.

The scroll element portion 3 composed of the scrolls 4 and 5 is housed in a housing chamber 21 formed by the bearing housing 2, and the bearing housing 2 is provided on the side opposite to the motor of the bearing housing 2. The discharge space 11 defined by the above is formed, and the external discharge pipe 12 is opened in the discharge space 11, while the bearing housing 2 is provided.
Suction pipe 1 in the inner space of the casing formed on the motor side of
3, the gas flowing from the suction pipe 13 is opened through the through hole 22 formed in the bearing housing 2, and the accommodation chamber 21 formed in the bearing housing 2 is opened.
I am trying to introduce it inside.

Further, in the driven scroll 5, a discharge port 52 is opened at the center of the end plate 31 of the driven scroll 5, and the discharge port 52 is communicated with a discharge passage 53 formed in the driven shaft 51. By opening the discharge passage 53 to the discharge space 11, the gas compressed in the scroll element portion 3 is discharged from the discharge passage 53 to the discharge space 11.

Therefore, in the above construction, when the drive scroll 4 is rotationally driven via the drive shaft 41 with the rotation of the motor M, the driven scroll 5 via the Oldham ring 33 and the thrust plate 6. While being driven by the drive scroll 4, the driven shaft 51 is swung about the driven shaft 51, and this swiveling motion causes the suction pipe 1 to move.
After the gas sucked into the casing 1 from 3 is introduced into the housing chamber 21, the gas is introduced into each of the scrolls 4.
The compressed high-pressure gas is sucked into the compression chamber between the five, and the compressed high-pressure gas is discharged from the discharge port 52 provided in the driven scroll 5.
Is discharged to the discharge space 11 through the discharge passage 53 in the driven shaft 51, and is discharged from the external discharge pipe 12 to the outside of the casing 1.

In the first embodiment of FIG. 1, however, the driven scroll 5 is supported so that the center of gravity of the scroll 32 substantially coincides with the center of rotation, while the drive scroll 4 is supported.
Of the scroll body 3 protruding from the end plate 31 of the drive scroll 4.
The base circle center of No. 2 is arranged at a position where compression is exerted by the co-rotational motion of both scrolls 4 and 5 with respect to the center circle of the spiral body 32 projecting from the end plate 31 of the driven scroll 5, and the drive is performed. On the extension line connecting the center of the basic circle of the spiral body 32 and the center of gravity of the spiral body 32 so that the position of the center of gravity of the end plate 31 of the scroll 4 substantially coincides with the center of rotation,
The balance adjusting unit 7 is provided.

That is, in the driven scroll 5, as shown in FIG. 2, the driven shaft 51 is provided at the center of the end plate 31 of the driven scroll 5, and the rotation center O1 of the driven shaft 51 is provided.
In addition, the spiral body 32 is projected on the mirror plate 31 so that the center of gravity R of the spiral body 32 projected on the mirror plate 31 is matched.

In the drive scroll 4, as shown in FIG. 2, the center circle S2 of the base circle of the spiral body 32 protruding from the end plate 31 of the drive scroll 4 is spirally protruded from the end plate 31 of the driven scroll 5. The scroll body 32 is located at a position where it is compressed by the co-rotational motion of the scrolls 4 and 5 with respect to the center S1 of the base circle of the body 32, and the drive provided at the center of the end plate 31 of the drive scroll 4 A position where the axis O2 of the shaft 41 is parallel to the axis O1 of the driven scroll 5 and a line connecting the centers S1 and S2 of the basic circles and is equal to the distance connecting the centers S1 and S2 of the basic circles. The spiral body 32 is provided so as to project from the end plate 31 of the drive scroll 4 so as to be eccentric.

In the first embodiment shown in FIG. 1, the drive shaft 4 is
In the state where the shaft center O2 of No. 1 is located at the radial center of the casing 1, the driven shaft 51 has the shaft center O1 of the driven shaft 51 with respect to the shaft center O2 of the drive shaft 41. The drive shaft 41 and the driven shaft 51 are rotatable about the bearing housing 2 by eccentric to a position that is parallel to the line connecting the circle centers S1 and S2 and is equal to the distance connecting the base circle centers S1 and S2. Bearings are supported.

Further, in the drive scroll 4, as shown in FIG. 3, the scroll 32 protruding from the end plate 31 of the drive scroll 4 is located at the center of the end plate 31, that is, the drive shaft 4.
Since it is arranged so as to be biased toward the outer side in the radial direction with respect to the shaft center O2 of No. 1, the distance between the shaft center O2 of the drive shaft and the center of gravity R of the spiral body 32 is considerably large. As it is, since the static balance and dynamic balance of the drive scroll 4 cannot be maintained as it is, the drive scroll 4
Among the built-up portions 42 provided on the outer peripheral portion of the end plate 31 for coupling with the thrust plate 6, on the extension line connecting the center S2 of the basic circle of the spiral body 32 and the center of gravity R, the spiral body 32. As shown in FIG. 3, the thickness of the built-up portion 42 provided on the opposite side of the winding end portion is increased inward in the radial direction, and as shown in FIG. The side is formed as a balance adjusting section 7, and the balance adjusting section 7 formed in the buildup section 42 is formed as a first balance adjusting section 71, and the balance adjusting amount is such that the spiral body 32 is projected. The center of gravity position T of the end plate 31 is set so as to substantially coincide with the rotation center O2.

Further, as shown in FIG. 1, the drive scroll 4 has an outer peripheral portion on the back side of the end plate 31, and
The formation side of the first balance adjusting portion 71 on the extension line connecting the center S2 of the basic circle of the spiral body 32 and the center of gravity R and 18
A first concave portion 43 is formed on the opposite side of 0 degree, and the first concave portion 4 is formed.
3, a second balance adjusting section 72 which is another balance adjusting section 7 is formed, and the second balance adjusting section 72 is used to lighten the side of the end plate 31 opposite to the first balance adjusting section forming side. The balance of the drive scroll 4 is adjusted better.

In the first embodiment shown in FIG. 1, the second balance adjusting portion 72 is formed by the concave portion 43, but at the outer peripheral portion on the back side of the end plate 31, the center circle S2 of the basic circle of the spiral body 32 is formed. Alternatively, a convex portion may be formed on the extension line connecting the center of gravity R on the side where the first balance adjusting portion 71 is provided.

Further, in the first embodiment, as shown in FIG. 1, it is formed on the rear surface of the thrust plate 6 coupled to the drive scroll 4 on the side opposite to the drive scroll, and on the rear surface of the end plate 31 of the drive scroll 4. The second concave portion 6 is positioned so as to be in the same axial position as the second balance adjusting portion 72.
1 and the second concave portion 61 forms a third balance adjusting portion 73 which serves as another balance adjusting portion 7. The third balance adjusting portion 73 forms the balance of the drive scroll 4. The adjustment is made even better.

This third balance adjusting section 73 is also the same as the first balance adjusting section 73.
When provided on the formation side of the balance adjusting portion 71, it may be formed as a convex portion, and when the second balance adjusting portion 72 and the third balance adjusting portion 73 are formed as convex portions, the second and third It is preferable to form the three balance adjusting portions 72 and 73 at the same position in the axial direction.

As described above, in the first embodiment, the driven scroll 5 is supported so that the center of gravity R of the spiral body 32 protruding from the end plate 31 of the driven scroll 5 substantially coincides with the rotation center O1. , The base circle center S2 of the spiral body 32 projecting from the end plate 31 of the drive scroll 4 with respect to the base circle center S1 of the spiral body 32 protruding from the end plate 31 of the driven scroll 5, The scrolls 4 and 5 are arranged at a position where they are compressed by the co-rotational motion of the scrolls 4, and the center of gravity T of the end plate 31 of the drive scroll 4 is set.
Is substantially the same as the rotation center O2.
Since the balance adjusting unit 7 (first balance adjusting unit 71) is provided on an extension line connecting the center S2 of the second basic circle S and the center R of gravity of the spiral body 32, one scroll for balance processing for performing balance adjustment. Since it is not necessary to do so, it is possible to reduce the number of man-hours required for performing balance processing, and since it is not necessary to provide a balance weight on the rotor of the motor as in the conventional case, the number of members for balance adjustment is also reduced. Therefore, the cost can be reduced accordingly.

Further, the spiral body 3 of the driven scroll 5
If the center of gravity R of 2 is aligned with the center of rotation, even if the height of the spiral body 32 is changed due to the design change accompanying the capacity adjustment,
Since it is not necessary to change the balance adjustment, it is only necessary to change the balance adjustment due to the design change for only one scroll. Therefore, it is possible to easily perform the change of the balance adjustment. Since the adjustment portion 71 and the second balance adjustment portion 72 including the first recess 43 are formed in the drive scroll 4, the balance adjustment can be performed without the need to separately install a member for balance adjustment. It is possible to prevent an increase in the number of parts while providing the balance adjusting section 7.

Further, the scroll element portion 3 is composed of a driving scroll 4, a driven scroll 5, and a thrust plate 6.
And the Oldham ring 33, the drive scroll 4 is integrally connected to the thrust plate 6, and the driven scroll 5 is installed inside the drive scroll 4, and the center of gravity R of the scroll 32 of the driven scroll 5 rotates. While supporting so as to be substantially coincident with the center O1, on the coupling portion side of the thrust plate 6 in the drive scroll 4 for coupling the thrust plate 6, that is, the padding portion 42 having the same height as the spiral body 32. Since the first balance adjusting portion 71 is provided on the inner peripheral side of the, since the height of the padding portion 42 is formed to be the same height as the height of the spiral body 32, the first balance adjusting portion 71 is It can be formed at the same height as the spiral body 32. Therefore, the first balance adjusting portion 71 can be formed evenly on both sides in the axial direction with respect to the center of the spiral body 32 in the height direction. Therefore, good balance adjustment can be performed, and further, since the space formed on the inner peripheral side of the build-up portion 42 can be used to form the first balance adjustment portion 71 in this space, the scroll member is The balance adjusting section 7 can be formed without increasing the size. Moreover, since the first balance adjusting portion 71 can be formed at the same time when the build-up portion 42 is formed, the cost can be reduced.

Further, even when the height of the spiral body 32 is changed by changing the design of the scroll element portion 3, the height of the padding portion 42 is also changed accordingly. Therefore, it is possible to eliminate the need to change the first balance adjusting unit 71.

Moreover, the end plate 31 of the drive scroll 4 is used.
The second balance adjusting portion 72 on the back surface of the thrust plate 6 connected to the drive scroll 4,
Since the third balance adjusting section 73 is provided, the balance adjusting sections 72 and 73 enable fine balance adjustment.

Further, since the second balance adjusting section 72 and the third balance adjusting section 73 are provided at the same position in the axial direction, the second and third balance adjusting sections 73 are provided in the spiral body 32. Since they are formed substantially symmetrically in the axial direction about the center in the height direction, fine adjustment of the balance of the drive scroll 4 can be performed more reliably and satisfactorily.

Next, a second embodiment will be described with reference to FIG. Similarly to the first embodiment, the second embodiment also shows a co-rotating scroll compressor. In the second embodiment, the scroll of one scroll is asymmetric with the scroll of the other scroll. Therefore, in the second embodiment, the winding end end of the spiral body 32 of the drive scroll 4 is extended by approximately 180 degrees with respect to the winding end end of the spiral body 32 of the driven scroll 5, and each spiral body is expanded. When the 32 and 32 are engaged with each other, the spiral body 3 in the drive scroll 4 is
The extended end of 2 is positioned near the winding end of the scroll 32 of the driven scroll 5, and in this state, the driven scroll 5 is shown in FIG. 2 as in the first embodiment. Thus, the center of gravity R of the spiral body 32 is supported so as to substantially coincide with the rotation center O1.

Further, in the drive scroll 4 in which the length of the spiral body 32 is extended, as shown in FIG. 5, the center of gravity R of the spiral body 32 and the center S2 of the basic circle are wound around the spiral body 32. Since the drive scroll 4 and the scrolls 32 of the driven scroll 5 are engaged with each other, the drive scroll 4 is projected to the end plate 31 of the drive scroll 4 because the drive scroll 4 and the scrolls 32 of the driven scroll 5 are engaged with each other. The center circle S2 of the scroll body 32 to be installed is located at a position where compression is exerted by the co-rotational motion of both scrolls 4 and 5 with respect to the center circle S1 of the scroll body 32 projecting from the end plate 31 of the driven scroll 5. End plate 3 of the drive scroll 4 so that it can be arranged
When the spiral body 32 is projectingly provided on the first scroll body 32, the spiral body 32 of the drive scroll 4 has a tip end of the winding start of the spiral body 32 substantially aligned with the center of rotation O2 which is the center of the end plate 31. Since it is projected in this state, the spiral body 32 can be positioned substantially at the center of the end plate 31.

Therefore, in the balance adjustment of the drive scroll 4, since the spiral body 32 is positioned substantially in the center of the end plate 31, the center of gravity R of the spiral body 32 can be brought closer to the rotation center O2, and the balance is accordingly increased. Since the adjustment amount can be reduced, in the second embodiment, as shown in FIG.
As shown in FIG. 5, the center S2 of the base circle of the spiral body 32 and the center of gravity R of the built-up portion 42 for coupling with the thrust plate 6 provided on the outer peripheral portion of the end plate 31 of the drive scroll 4 are arranged. On the extension line connecting the spiral body 3
As shown in FIG. 5, the thickness of the built-up portion 42 provided on the side opposite to the winding end portion of No. 2 is increased inward in the radial direction so that the built-up portion 42 is located radially inward from the dotted line of the built-up portion 42. The other side is the balance adjusting section 7. The balance adjustment amount of the balance adjustment unit 7 is the same as the spiral body 3
The position T of the center of gravity of the end plate 31 is set so as to coincide with the center of rotation O2 in the state where 2 is projected.

As described above, in the second embodiment, the winding end portion of the spiral body 32 in the drive scroll 4 is
The spiral scroll 3 is extended by approximately 180 degrees with respect to the end end of the spiral body 32 of the driven scroll 5, and each spiral body 3 is extended.
The spiral body 3 of the drive scroll 4 is formed by meshing 2 and 32 with each other.
The extended end portion 2 of the driven scroll 5 is located near the winding end portion of the spiral body 32 of the driven scroll 5.
Is supported so that the center of gravity of the spiral body 32 substantially coincides with the center of rotation, so that the center of rotation O of the drive scroll 4 is supported.
2, the center of gravity R of the spiral body 32 automatically approaches, so that the driven scroll 5 does not require its balance processing, and the drive scroll 4 is
Even if balance adjustment is required, the amount of balance adjustment can be reduced, so that the amount of balance processing can be reduced while preventing an increase in the number of parts, which further reduces the cost.

Further, the spiral body 3 of the driven scroll 5
If the center of gravity R of 2 is aligned with the center of rotation, even if the height of the spiral body 32 is changed due to the design change accompanying the capacity adjustment,
Since it is not necessary to change the balance adjustment, it is possible to change the balance adjustment due to the design change on one side of the drive scroll
It is sufficient to carry out only the above, and the balance processing of the drive scroll 4 can be reduced.

Further, in the second embodiment as well, since the balance adjusting portion 7 is provided on the inner peripheral side of the built-up portion 42 having the same height as the spiral body 32, the height direction of the spiral body 32 is centered. On the other hand, since the balance adjusting portion 7 can be formed uniformly toward both sides in the axial direction, good balance adjustment can be performed, and further, by utilizing the space formed on the inner peripheral side of the padding portion 42, Since the balance adjusting portion 7 can be formed with a small amount of processing, the balance adjusting portion 7 can be formed without increasing the size of the member, and the cost can be reduced more favorably.

Further, in the second embodiment, since the balance adjustment amount may be small, it is not necessary to form another balance adjustment portion, so that the man-hours of the balance processing can be reduced and the cost can be further reduced. is there.

Further, the scroll 32 of the drive scroll 4 is used.
When increasing the length of the spiral body 32, as in the third embodiment shown in FIG.
May be formed on both sides of the built-up portions 42, 42 on an extension line connecting the center S2 of the basic circle and the center of gravity R. At this time, the balance adjustment amount on the winding end side of the spiral body 32 is adjusted. , Less than the end of the counter winding.

In this case, since the spiral body 32 can be connected to the padding portions 42, 42 formed on both sides in the radial direction with respect to the center of rotation through the balance adjusting portion 7, the spiral body 32 can be connected. The strength of 32 can be improved.

Further, the balance adjusting section 7 is not formed on the inner peripheral side of the padding section 42, but is formed like the second balance adjusting section 72 and the third balance adjusting section 73 of the first embodiment. In addition, it may be formed only on the back surface of the thrust plate and the back surface of the end plate of the scroll coupled to the thrust plate.

Further, in each of the above-mentioned embodiments, the follower scroll 5 is arranged so that the center of rotation of the scroll 32 is aligned with the center of gravity R of the scroll 32 to adjust the balance. The center of gravity R of the body 32 may be matched and the driven scroll 5 may be provided with the balance adjusting unit 7. At this time, it is preferable that the drive scroll 4 be held by the driven scroll 5 and the thrust plate 6.

The balance adjusting portion 7 may be formed only on the rear surface of the end plate 31 of the scroll on the side requiring balance adjustment, or may be formed only on the thrust plate 6. You may
In particular, as in the second embodiment, when the scroll body 32 of the scroll on the side where the balance adjustment portion 7 is provided is asymmetrical, the balance adjustment amount is small, so the amount of processing on the thrust plate 6 is small. Less and can be done effectively.

In each of the above embodiments, the horizontal type compressor is shown, but it goes without saying that the present invention can be applied to the vertical type compressor.

Needless to say, the present invention can be applied not only to the co-rotating scroll compressor but also to the expander if it is a co-rotating scroll fluid machine.

[0056]

According to the first aspect of the present invention, the center of gravity of the scroll 32 in which the scroll 5 or 4 of the drive scroll 4 and the driven scroll 5 is projected on the end plate 31 of the scroll 5 or 4 Since it is supported so as to be substantially coincident with the center of rotation, it is not necessary to perform the balance processing for adjusting the balance for one scroll 5 or 4, so the processing man-hours for performing the balance processing can be reduced accordingly. Moreover, since it is not necessary to provide a balance weight on the rotor of the motor as in the conventional case, the number of members for adjusting the balance can be reduced.
The cost can be reduced accordingly.

Further, the one scroll 5 or 4
If the center of gravity of the spiral body 32 is aligned with the center of rotation, it is not necessary to change the balance adjustment even if the height of the spiral body 32 is changed due to the design change accompanying the capacity adjustment. Changing the balance adjustment also scrolls the other 4
According to the invention of claim 2, the balance adjusting section 7 can be easily performed because it is necessary to perform only for 5 or 5.
Since at least one of the concave portion and the convex portion is provided on the other scroll 4 or 5, the balance adjustment can be performed without the need to separately attach a member for balance adjustment. It is possible to prevent the score from increasing.

[0058] According to the third aspect of the invention, utilizing conjugation side of the thrust plate 6 of the other scroll 4 or 5 saddled one scroll 5 or 4 and the thrust plate 6, the binding Since the balance adjustment portion 7 is formed on the side of the portion, the height of the joint portion is formed to be the same as the height of the spiral body 32. Therefore, the balance adjustment portion 7 is the same as the spiral body 32. Since the height of the scroll 32 can be increased, and the balance adjusting portions 7 can be evenly formed on both sides in the axial direction with respect to the center of the spiral body 32 in the height direction, good balance adjustment can be performed, and the scroll member becomes large. Without adjusting the balance adjustment section 7
Can be formed.

Further, even if the height of the spiral body 32 is changed due to the design change of the scroll element portion 3, the height of the connecting portion is also changed accordingly. Therefore, it is possible to eliminate the need to change the balance adjusting unit 7.

According to the fourth aspect of the present invention, since the thrust plate 6 is provided with the balance adjusting portion 7 consisting of at least one of a concave portion and a convex portion, the number of parts does not increase and the scroll 4 of the other side is provided. or to easily balanced up than done in 5, by combination with balance adjustment in the other scroll 4 or 5 in the invention of claim 3, it has not been adjusted in the other scroll 4 or 5 The balance can be corrected and the balance can be adjusted better.

According to the invention described in claim 5, in the invention described in claim 4, balance adjusting parts 7, 7 are provided in the thrust plate 6 and the other scroll 4 or 5 connecting the thrust plate 6 to each other. Therefore, since these balance adjusting parts 7, 7 can be formed in the axial direction centering on the center of the spiral body 32 in the height direction, the distance between the centers of gravity of the scrolls 4, 5 in the axial direction can be adjusted. Not only can the fine adjustment of the balance of the other scroll 4 or 5 be performed more reliably and satisfactorily, but the adjustment of the dynamic balance can also be performed reliably.

According to the sixth aspect of the present invention, the winding end end of the scroll body 32 of the other scroll 4 or 5 is set to 1 with respect to the scroll body 32 of one scroll 5 or 4.
Since then extended 80 degrees was asymmetric, center of gravity of the other scroll 4 or 5 the winding finish end portion extended 180 degrees, so the opposite side of the case of a symmetrical, this other <br/> scroll It approaches the center of rotation of 4 or 5,
Therefore, when the balance adjustment is performed in the other scroll 4 or 5, the balance adjustment amount can be reduced, the balance adjustment can be made effective, and the cost can be further reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a compressor showing a first embodiment of a co-rotating scroll fluid machine of the present invention.

FIG. 2 is a top view of a driven scroll according to the first embodiment.

FIG. 3 is a top view of the drive scroll according to the first embodiment.

FIG. 4 is a partially cutaway sectional view of a compressor showing a second embodiment of the present invention.

FIG. 5 is a top view of the drive scroll according to the second embodiment.

FIG. 6 is a top view of a drive scroll according to a third embodiment of the present invention.

FIG. 7 is a sectional view showing a conventional co-rotating scroll fluid machine.

FIG. 8 is an exploded view of a conventional co-rotating scroll element portion.

[Explanation of symbols]

3 scroll element part 5 driven scroll 31 end plate 51 driven shaft 32 spiral body 6 thrust plate 33 Oldham ring 7 balance adjustment part 4 drive scroll 41 drive shaft

Front page continuation (72) Inventor Hiromichi Taniwa 3-12 Tsukiko Shinmachi, Sakai City, Osaka Prefecture Daikin Industry Co., Ltd. Sakai Plant, inside the seaside factory (56) Reference JP-A-4-209982 (JP, A) JP-A-3-260388 (JP, A) JP-A-5-126067 (JP, A) JP-A-4-314984 (JP, A) JP-A 64-24191 (JP, A) JP-A 64-302 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04C 18/02 311

Claims (6)

(57) [Claims] 1. A drive scroll (4) centering on a drive scroll (4) that rotates in conjunction with a drive shaft (41) and a driven shaft (51) that is eccentric from the axis of the drive shaft (41). In a co-rotating scroll fluid machine equipped with a scroll element portion (3) consisting of a driven scroll (5) that is driven by the rotation of the scroll (5), one of the drive scroll (4) and the driven scroll (5) is scrolled (5 or 4) is the end plate (31) of the scroll (5 or 4)
While supporting the center of gravity of the spiral body (32) protruding from the center of the scroll body (32) so as to substantially coincide with the center of rotation, the other scroll (4 or 5) is attached to the end plate (3) of the other scroll (4 or 5).
1) with respect to the center of the base circle of the spiral body (32) projecting on the end plate (31) of the scroll (5 or 4) of the scroll (5 or 4). 4) It is arranged at a position where compression and expansion work by the co-rotating motion of (5), and the center of gravity of the end plate (31) of the other scroll (4 or 5) substantially coincides with the center of rotation. on the extension connecting the center of gravity of the base circle center and eddy Makitai of the spiral body (32) (32), characterized in that the balance adjusting unit (7) is provided, co-rotation type scroll fluid machine. 2. A balance adjustment unit (7), the other scroll (4 or 5) to form by providing at least one recessed portion and the projected portion, co-rotation type scroll fluid machine of claim 1, wherein. 3. The scroll element portion (3) comprises a drive scroll (4), a driven scroll (5), a thrust plate (6) and an Oldham ring (33), and the other one.
The scroll (4 or 5) attached integrally with the thrust plate (6), and interior to the one scroll <br/> Lumpur therein (5 or 4), said one scroll (5
Or 4) so that the center of gravity of the spiral body (32) substantially coincides with the center of rotation, while the thrust plate (6) in the other scroll (4 or 5) connecting the thrust plate (6) is supported. the coupling portion side of) is provided balance adjustment unit (7), also claim 1
Is a co-rotating scroll fluid machine described in 2 . 4. The scroll element portion (3) comprises a drive scroll (4), a driven scroll (5), a thrust plate (6) and an Oldham ring (33), and the other one.
The scroll (4 or 5) attached integrally with the thrust plate (6), and interior to the one scroll <br/> Lumpur therein (5 or 4), said one scroll (5
Or 4) is supported on the thrust plate (6) which is supported so that the center of gravity of the spiral body (32) is substantially coincident with the center of rotation, while being connected to the other scroll (4 or 5). , balance adjustment unit comprising at least one recess and protrusions are provided (7), co-rotation type scroll fluid machine <br/> claim 1 or 3. 5. A thrust plate (6) and the other scroll (4) connecting the thrust plate (6).
Or 5) and in that the balance adjusting unit (7) (7) provided, co-rotation type scroll fluid machine according to claim 4. 6. The winding end end of the spiral body (32) of the other scroll (4 or 5) is replaced by the winding end end of the spiral body (32) of the one scroll (5 or 4). The spiral end (32) of the other scroll (4 or 5) by engaging the spiral bodies (32) (32) with each other by extending them by approximately 180 degrees. the by close winding end portion of one of the scroll (5 or 4), said one scroll (5
Or 4), and supports the center of gravity of the spiral body (32) substantially coincides with the center of rotation, according to claim 1-5 noise
Co-rotation type scroll fluid machine Rekani described.